The solid-state-drive and the MacBook Air. 64 GB of goodness and no moving parts. You know you want it; fast, quiet, cool, power-saving and simply the finest laptop money can buy -- plus, you can shave with the front end, or slice cucumbers. One minor note, however, for those who measure their tax refunds in the thousands instead of the tens or hundreds of thousands: this prime bit of kit will take a huge bite out of your bankroll.
How huge? Check the Apple Store (and marvel that the number wasn't mentioned specifically in the keynote except to say "pricey") -- a whopping $3100 for the new hotness. Sure, it may be worth every penny, but first you have to find all those pennies and herd them into a recognizable grouping of some sort.
Would the SSD MBA be worth it to you? Extra points if you don't have an actual M.B.A. graduate degree and you can still afford one.